JP4882709B2 - High-strength bolt friction joint structure - Google Patents
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Description
本発明は、鋼材同士の接合に用いられる高力ボルト摩擦接合構造に関するものである。 The present invention relates to a high-strength bolt friction joint structure used for joining steel materials.
接合する一対のＨ形鋼などの鋼材同士の接合端部のフランジをスプライスプレートで挟み込み、高力ボルトで締め付けることによりスプライスプレートと鋼材との摩擦接合面の摩擦力により力を伝達する高力ボルト摩擦接合工法において、摩擦接合面が赤錆面である場合、そのすべり係数は、大きいもので0.6程度、バラツキを考慮すると平均的には0.45程度である。 A high-strength bolt that transmits force by the frictional force of the friction joint surface between the splice plate and the steel material by sandwiching the flange at the joint end of a pair of steel materials such as H-shaped steel with a splice plate and tightening with a high-strength bolt In the friction bonding method, when the friction bonding surface is a red rust surface, the slip coefficient is about 0.6 at the largest, and on average about 0.45 considering variation.
すべり係数を大きくするために、これまで種々の技術が考案され、主に（1）摩擦接合面の間に高硬度の突起状の中間物を介在させる方式、（2）高硬度の添板の表面に凸凹の加工を施す方式、（3）母材あるいは添板の表面に金属やセラミックスを溶射する方式の３通りに大別される。 In order to increase the slip coefficient, various technologies have been devised so far. Mainly (1) a method of interposing a high-protrusion intermediate between the friction joint surfaces, (2) There are roughly three types: a method of processing the surface irregularities, and (3) a method of spraying metal or ceramics on the surface of the base material or the accessory plate.
（1）の中間物を介在させる方式としては、形鋼の表面とフィラープレート双方に凹凸を設け、フィラープレートの外側に跨って添板を高力ボルトにより締結したもの。母材と添板の隙間に母材や添板より強度、硬度に優れた板状材の両面に突起を形成したもの。摩擦接合面の間に突起を設けた接合補助材を介在させたもの。ボルト孔周囲の座ぐり部に突起を設けた接合補助材を介在させたもの。ボルト孔周囲に円弧状の硬質の補助材を介在させたもの。摩擦接合面に塗布材に繊維を混入させたもの。摩擦接合面に硬質粒子を含有する分散液を塗布あるいは硬質粒子を分散させたシートを置いたもの。摩擦接合面に砥粒や硬化処理金属粒、高硬度金属粒を介在させたもの。摩擦接合面に強度の高い線材を介在させたもの。摩擦接合面の間に表面に突起を設けた中間補助材を介在させたもの。などがある。 As a method of interposing the intermediate in (1), the surface of the shape steel and the filler plate are provided with irregularities, and the accessory plate is fastened with a high-strength bolt across the outside of the filler plate. Projections are formed on both sides of a plate-like material that is superior in strength and hardness to the gap between the base material and the accessory plate. A joint auxiliary material provided with protrusions between the friction joint surfaces. A joint auxiliary material provided with protrusions on the counterbore around the bolt hole. An arc-shaped hard auxiliary material is interposed around the bolt hole. The friction joint surface is made by mixing fibers into the coating material. The friction joint surface is coated with a dispersion containing hard particles or placed with a sheet dispersed with hard particles. Abrasive grains, hardened metal grains, and high-hardness metal grains intervened on the friction joint surface. A high strength wire intervened on the friction joint surface. An intermediate auxiliary material with protrusions on the surface is interposed between the friction surfaces. and so on.
この中で表面に突起を有する板状のものは、板状介在物の突起加工にコストが掛かり高価なものとなる。施工時のセット手間も増える。また、硬質粒子や繊維を塗料に混ぜて塗布する場合には塗料中に粒子を均一に拡散させ、むらなく所定の量を塗布させるための管理が必要で、施工時の不確定性を考慮すると煩雑なものになる。また、長期のクリープ変形に対する問題もある。 Among these, the plate-like thing which has a processus | protrusion on the surface requires a cost for the process of projecting a plate-shaped inclusion, and becomes expensive. Setting work at the time of construction also increases. In addition, when mixing hard particles and fibers with the paint, it is necessary to manage to uniformly spread the particles in the paint and uniformly apply a predetermined amount, considering the uncertainty during construction. It becomes complicated. There is also a problem with long-term creep deformation.
（2）の高硬度の添板の表面に突起加工をする方式として、添板の表面に突起形状のパラメータを規定して円柱状突起を設けたもの。添板の表面粗さＲｚや母材に対する硬さ比率を規定したもの。添板の表面ＨｖやＲmax値を規定したもの。鋼材成分系の規定、突起の高低差および硬さを規定したもの。添板のボルト孔周囲に同心円状にローレット加工で凸凹模様をつけたもの。添板の表面硬さの比、突起高さを規定したもの。添板の成分系の規定、Ｒｚ規定、Ｈｖを規定したもの。などがある。 (2) As a method of processing protrusions on the surface of a high hardness accessory plate, a cylindrical protrusion is provided on the surface of the accessory plate by defining the protrusion shape parameters. This specifies the surface roughness Rz of the accessory plate and the hardness ratio to the base material. The surface Hv and Rmax values of the accessory plate are specified. The steel material component system, the height difference and hardness of the protrusion. Concave and rounded concavity and convexity around the bolt holes on the accessory plate. The ratio of the surface hardness of the plywood and the height of the protrusions are specified. Definition of the component system of the accessory plate, Rz specification, and Hv. and so on.
しかし、高硬度の添板の表面を加工する方式は、ａ）高硬度の特別な材を用いなければならないこと、ｂ）表面の凸凹加工が機械加工となり加工手間が掛かりことから、高価なものとなる。さらに、被接合材（母材）同士で板厚に大きく差がある場合には適用しづらい点も問題である。 However, the method of processing the surface of a high hardness accessory plate is expensive because a) a special material with high hardness must be used, and b) uneven processing of the surface becomes a machining process, which takes time and effort. It becomes. Furthermore, it is also a problem that it is difficult to apply when there is a large difference in plate thickness between materials to be joined (base materials).
本発明と関連性の高い（3）の溶射方式としては、特許文献１に記載されているように、接合面の少なくとも１面に耐食性金属をプラズマ溶射する方式。特許文献２に記載されているように、ボルト孔の回りの接合面にセラミックのプラズマ溶射を施す方式。特許文献３に記載されているように、添板表面に金属またはセラミック溶射を施す方式。などがある。
As (3) thermal spraying method that is highly relevant to the present invention, as described in
しかし、プラズマ溶射は、溶射材にパウダー（粉末）を使用するため、溶射材料自体は安価ではなく、溶射効率もさほど高くないため、高価なものとなる。この点、アーク溶射を用いればコスト的には非常に有利であるが、プラズマ溶射やセラミック溶射で高いすべり係数（本発明では0.7以上）を発揮するものはあるが、安価なアーク溶射で0.7以上の高いすべり係数を発揮できるものはこれまで見られない。 However, since plasma spraying uses powder as a thermal spray material, the thermal spray material itself is not inexpensive and the thermal spraying efficiency is not so high, so that it becomes expensive. In this regard, using arc spraying is very advantageous in terms of cost, but there are plasma spraying and ceramic spraying that exhibit a high slip coefficient (0.7 or more in the present invention), but inexpensive arc spraying is 0.7 or more. No one that can exhibit a high slip coefficient has ever been seen.
本発明に関連する溶射方式においては、すべり係数は、溶射金属の表面状態や硬さに依存することはわかっているが、これら物性に関し従来知られている指標だけでは、安定して高いすべり係数を得ることはできなかった。 In the thermal spraying system related to the present invention, it is known that the slip coefficient depends on the surface state and hardness of the sprayed metal, but only a conventionally known index regarding the physical properties is stable and has a high slip coefficient. Could not get.
本発明は、スプライスプレートと高力ボルトを用いた高力ボルト摩擦接合構造において、安価なアーク溶射により摩擦接合面に0.7以上の高いすべり係数を確実に安定して付与することができ、簡単で安価な高摩擦接合工法が実現できる高力ボルト摩擦接合構造を提供するものである。 The present invention is a high-strength bolt friction joint structure using a splice plate and a high-strength bolt, and can stably and stably apply a high slip coefficient of 0.7 or more to the friction joint surface by inexpensive arc spraying. The present invention provides a high-strength bolt friction joint structure capable of realizing an inexpensive high friction joint method.
本発明は、安価で安定的にすべり係数を発揮できる高摩擦接合工法の得ることを目的とし、安価で管理も容易なアーク溶射による高摩擦化を狙う。また、すべり係数に影響するパラメータとして一般に溶射金属の硬さ、粗さ（最大高さＲmax）が挙げられる。しかし、本発明での種々の検討により、上記パラメータだけでは不十分で、安定的に高いすべり係数を発揮するには溶射面の凸凹形状の均質性が重要であることを解明した。本発明では、金属溶射面の最大高さから100μmの位置での輪郭曲線の負荷長さ率（＝凸部の切断長さの総和／基準長さ）という指標で、溶射面の凸凹形状の均質さを定量的に示した。 An object of the present invention is to obtain a high-friction joining method capable of exhibiting a slip coefficient stably at low cost, and aims at high friction by arc spraying that is inexpensive and easy to manage. Further, as parameters affecting the slip coefficient, generally, the hardness and roughness (maximum height Rmax) of the sprayed metal can be mentioned. However, through various studies in the present invention, it has been clarified that the above parameters alone are not sufficient, and that the uniformity of the uneven shape of the sprayed surface is important in order to stably exhibit a high slip coefficient. In the present invention, the contour curve load length ratio (= total sum of cutting lengths of protrusions / reference length) at the position of 100 μm from the maximum height of the metal sprayed surface is used. This was shown quantitatively.
本発明の請求項１に係る高力ボルト摩擦接合構造は、接合する一対の鋼材同士の接合端部に添接した継手板を高力ボルトで締め付け、継手板と鋼材との摩擦接合面の摩擦力により力を伝達する高力ボルト摩擦接合構造において、前記摩擦接合面に、ビッカース硬度Ｈｖ300以上、かつ、表面粗さの最大高さＲmaxが100μm以上、かつ、表面粗さの最大高さＲmaxが100μm以上、かつ、表面粗さの最高高さから下へ100μmの位置での輪郭曲線の負荷長さ率Ｒmr（100）（＝凸部の切断長さの総和Ｌ／基準長さＴＬ、図４参照）が0.34以上の被膜がアーク溶射により形成されていることを特徴とする高力ボルト摩擦接合構造である。
The high-strength bolt friction joint structure according to
アーク溶射は、金属線（ワイヤー状）を溶射電流でアーク溶融させ、高圧エアで微粒粉砕させ、高速で吹き付けて金属被膜を形成するものである。ビッカース硬度Ｈｖ300以上で表面粗さの最大高さＲmaxが100μm以上の金属溶射面の凸凹形状を均質とすることで、すべり係数を0.7以上とすることができる。Ｒmaxを低下させないように、溶射電流を下げ、あるいはエア圧力を低下させることにより、溶射面の山谷形状を均一にすることができる。 In arc spraying, a metal wire (wire shape) is arc-melted with a spraying current, finely pulverized with high-pressure air, and sprayed at a high speed to form a metal coating. By making the uneven surface of the metal spray surface having a Vickers hardness of Hv300 or more and a maximum surface roughness Rmax of 100 μm or more uniform, the slip coefficient can be made 0.7 or more. By reducing the spray current or lowering the air pressure so as not to reduce Rmax, the peaks and valleys of the sprayed surface can be made uniform.
Ｒmr（100）は、図４に示すように、溶射面の凸凹の均一さを定量的に評価するものであり、図３に示すように、この値が大きいほど溶射面の山谷形状が均一になる（Ａ材は0.93、Ｃ材は0.34）。Ｒmrはボルト締め付け時に溶射金属が被接合材側に食い込み、その後、せん断力を受けた場合の有効なせん断変形の領域を示し、Ｒmrが大きい程、せん断変形に抵抗する溶射金属の領域が大きくなることを意味する。Ｒmr＝0.34ですべり係数0.7以上が得られており、Ｒmrは0.34以上とする。 As shown in FIG. 4, Rmr (100) quantitatively evaluates the unevenness of the sprayed surface. As shown in FIG. 3, the larger the value, the more uniform the valley shape of the sprayed surface. (A material is 0.93, C material is 0.34). Rmr indicates a region of effective shear deformation when the sprayed metal bites into the material to be joined at the time of bolt tightening, and thereafter receives a shearing force. Means that. A slip coefficient of 0.7 or more is obtained with Rmr = 0.34, and Rmr is 0.34 or more.
なお、すべり係数は、図５に示すように、高くなるほど、ボルト本数を少なくすることができるが、0.7を超えると、ボルト本数の低下率は小さくなるため、すべり係数は0.70以上あれば、実用上は十分であり、目標すべり係数は0.70以上に設定した。 As shown in FIG. 5, as the slip coefficient increases, the number of bolts can be reduced. However, if the slip coefficient exceeds 0.7, the rate of decrease in the number of bolts decreases, so if the slip coefficient is 0.70 or more, it is practical. The above is enough, and the target slip coefficient is set to 0.70 or more.
本発明の請求項２に係る高力ボルト摩擦接合構造は、請求項１に記載の高力ボルト摩擦接合構造において、継手板の鋼材との摩擦接合面に被膜が形成されていることを特徴とする高力ボルト摩擦接合構造である。
The high-strength bolt friction joint structure according to
図１、図２に示すように、スプライスプレートやフィラープレート等の継手板の少なくとも片面（鋼材との摩擦接合面）にアーク溶射による金属溶射被膜を形成し、更なるコストの低減を図る。なお、被接合材の鋼材と継手板の表面は、溶射に先立ってブラスト処理等の表面処理を施す。 As shown in FIGS. 1 and 2, a metal spray coating by arc spraying is formed on at least one surface (friction joint surface with a steel material) of a joint plate such as a splice plate or a filler plate to further reduce costs. In addition, the steel materials and the surfaces of the joint plates to be joined are subjected to a surface treatment such as a blast treatment prior to thermal spraying.
以上のような本発明によれば、スプライスプレートと高力ボルトを用いた高力ボルト摩擦接合構造において、安価なアーク溶射により摩擦接合面に0.7以上の高いすべり係数を確実に安定して付与することができ、安価で安定した性能の高摩擦接合工法が実現できる。 According to the present invention as described above, in a high-strength bolt friction joint structure using a splice plate and a high-strength bolt, a high slip coefficient of 0.7 or more is reliably and stably applied to the friction joint surface by inexpensive arc spraying. It is possible to realize a high-friction joining method with low cost and stable performance.
(1) 高力ボルト摩擦接合構造の摩擦接合面に、ビッカース硬度300以上、表面粗さの最大高さＲmaxが100μm以上、溶射面の凸凹形状が均質、例えばＲmr0.34以上の金属被膜をアーク溶射により形成するため、安価なアーク溶射により摩擦接合面に0.7以上の高いすべり係数を確実に安定して付与することができ、低コストで安定した性能の高摩擦接合工法を実現することができる。
(2) スプライスプレート等の継手板の片面にアーク溶射による被膜を形成することにより、更なるコストの低減が可能となる。
(1) Arc a metal film with a Vickers hardness of 300 or more, a maximum surface roughness Rmax of 100μm or more, and an uneven surface of the sprayed surface, for example, Rmr 0.34 or more, on the friction joint surface of the high strength bolt friction joint structure. Because it is formed by thermal spraying, a high slip coefficient of 0.7 or more can be reliably and stably applied to the friction joint surface by inexpensive arc spraying, and a high-friction joining method with low cost and stable performance can be realized. .
(2) By forming a coating by arc spraying on one side of a joint plate such as a splice plate, the cost can be further reduced.
以下、本発明を図示する実施形態に基づいて説明する。図１、図２は、本発明の高力ボルト摩擦接合構造の構成例を示したものである。図１において、被接合材の一対のＨ形鋼１、１の接合端部における平行フランジ２、２およびウェブ３を一対のスプライスプレート４、４で挟み込み、高力ボルト５とナット６で締め付け、スプライスプレート４とＨ形鋼１との摩擦接合面の摩擦力により力を伝達する高力ボルト摩擦接合構造が形成されている。スプライスプレート４の片面の摩擦接合面に本発明に係るアーク溶射による金属溶射被膜１０が形成される。
Hereinafter, the present invention will be described based on the illustrated embodiments. 1 and 2 show a configuration example of the high-strength bolt friction joint structure of the present invention. In FIG. 1, the
図２は、被接合材同士で板厚に差がある場合の構成例であり、板厚の薄い側にフィラープレート７が挟み込まれる。スプライスプレート４およびフィラープレート７の片面の摩擦接合面に金属溶射被膜１０が形成される。フィラープレート７の両面に金属溶射被膜１０を形成しても問題ない。
FIG. 2 is a configuration example in the case where there is a difference in the plate thickness between the materials to be joined, and the
このような高力ボルト摩擦接合構造において、本発明に係るアーク溶射による金属溶射被膜１０は、（1）ビッカース硬度Ｈｖ300以上、（2）表面粗さの最大高さＲmaxが100μm以上、（3）表面粗さの最高高さから下へ100μmの位置での輪郭曲線の負荷長さ率（＝凸部の切断長さの総和／基準長さ）Ｒmr(100)が0.34以上の３つの条件を満たすようにし、すべり係数0.70以上が確保されるようにする。以下、この３つの条件について詳述する。
In such a high-strength bolt friction joint structure, the metal sprayed
金属溶射を用いた摩擦接合面では溶射金属の硬さ、表面粗さの最大高さＲmaxが着目される。これは、ａ）硬い金属が被接合材に食い込み易いこと、ｂ）定性的に表面が粗い方がすべり係数が高くなることによる。しかし、種々の検討の結果、硬さ、Ｒmaxは必要条件であるが、必要十分条件ではないことが判明した。 Attention is paid to the hardness of the sprayed metal and the maximum height Rmax of the surface roughness on the friction bonded surface using metal spraying. This is because a) a hard metal tends to bite into the material to be joined, and b) a qualitatively rough surface has a higher slip coefficient. However, as a result of various studies, it has been found that hardness and Rmax are necessary conditions but not necessary and sufficient conditions.
表１はすべり試験の結果である。被接合材、スプライスプレート共に材質はＳＭ490材である。被接合材の表面処理は同一条件でブラスト処理し、スプライスプレートには３種類の金属をアーク溶射している。Ａはステンレス系のワイヤーを、Ｂは炭素が２％程度含まれたワイヤー、Ｃは炭素が５％程度含まれた高炭素系のワイヤーである。Ｂ´はＢと同一の材料であるが、溶射面の粗さを粗くした場合である。ＲmaxはＡ,Ｂ,Ｃいずれも優位差はない。Ｂ´はＢに比べＲmaxが大きくなっている。また、ビッカース硬度ＨｖはＣ、Ｂ（Ｂ´）、Ａの順に低くなる。 Table 1 shows the results of the sliding test. The material to be joined and the splice plate are SM490 materials. The surface treatment of the materials to be joined is blasted under the same conditions, and three types of metal are arc sprayed on the splice plate. A is a stainless steel wire, B is a wire containing about 2% carbon, and C is a high carbon wire containing about 5% carbon. B ′ is the same material as B, but the sprayed surface is roughened. There is no difference in Rmax between A, B and C. B ′ has a larger Rmax than B. Further, the Vickers hardness Hv decreases in the order of C, B (B ′), and A.
これまでの知見では、Ｒmaxが同一であれば、硬さの高い順にすべり係数は高くなると考えられていた。しかし、試験では、これとは逆にすべり係数は硬さの最も低いＡ材がすべり係数が高い結果である。また、ＡとＡ´およびＢとＢ´を比較すると粗さの大きい方がすべり係数が低くなっている。 According to the knowledge so far, it has been considered that if Rmax is the same, the slip coefficient increases in the order of increasing hardness. However, in the test, on the contrary, the slip coefficient is a result of the material A having the lowest hardness having a high slip coefficient. Further, when A and A ′ and B and B ′ are compared, the slip coefficient is lower when the roughness is larger.
表１のＲmr（100）は溶射面の最高高さから100μmの位置での負担率（負荷長さ率）である。Ｒmr（100）はすべり係数の高い順に大きくなっている。 Rmr (100) in Table 1 is a load factor (load length factor) at a position of 100 μm from the maximum height of the sprayed surface. Rmr (100) increases in descending order of the slip coefficient.
図３は各溶射金属の表面のプロフィールの例である。Ａ材とＣ材を比較すると、Ａ材は山谷の形状が均一なのに対して、Ｃ材は山谷の形状が不均一になっている。この不均一さを定量的に評価したのが表１のＲmrである。図４に示すように、Ｒmrは山を最高高さから下へＸの位置で切断した長さの総和Ｌを基準長さＴＬで除した値で定義する。なお、基準長さＴＬは長い方が正確になるため、最低でも10mm以上が望ましい。Ｒmrはボルト締め付け時に溶射金属が被接合材側に食い込み、その後、せん断力を受けた場合の有効なせん断変形の領域を示し、Ｒmrが大きい程、せん断変形に抵抗する溶射金属の領域が大きくなることを意味する。 FIG. 3 is an example of the surface profile of each spray metal. Comparing the A material and the C material, the A material has a uniform mountain valley shape, whereas the C material has a non-uniform mountain valley shape. Rmr in Table 1 is a quantitative evaluation of this non-uniformity. As shown in FIG. 4, Rmr is defined as a value obtained by dividing the sum L of the lengths of the peaks cut from the maximum height down at the position X by the reference length TL. In addition, since the reference length TL is more accurate, it is preferably at least 10 mm. Rmr indicates a region of effective shear deformation when the sprayed metal bites into the material to be joined at the time of bolt tightening, and thereafter receives a shearing force. Means that.
本発明で示したような表面形状は、溶射条件を調整することで得られる。一般に、溶射面の粗さは溶射電流を下げ、あるいはエア圧力が小さい方が、溶射面の山谷の形状を均一にできる。ただし同時にＲmaxを低下させる傾向にあるので、溶射電圧等他の条件とバランスを組み合わせに適正な条件を設定する。この適性条件の一例としては、電圧30Ｖ程度で電流：100Ａ〜300Ａ、エア圧力：50psi〜80psi（約0.34〜0.55MPa）の範囲で溶射することが挙げられる。 The surface shape as shown in the present invention can be obtained by adjusting the thermal spraying conditions. In general, the roughness of the sprayed surface can make the shape of the peaks and valleys of the sprayed surface uniform when the spraying current is lowered or the air pressure is lower. However, since Rmax tends to decrease at the same time, an appropriate condition is set in combination with a balance with other conditions such as a spray voltage. As an example of this suitability condition, thermal spraying is performed in a range of current: 100 A to 300 A, air pressure: 50 psi to 80 psi (about 0.34 to 0.55 MPa) at a voltage of about 30 V.
本発明では、目標すべり係数を0.70とする。0.70以上を満足するＲmr（100）は表１より0.34以上となる。 In the present invention, the target slip coefficient is set to 0.70. Rmr (100) satisfying 0.70 or more is 0.34 or more from Table 1.
目標すべり係数0.70の根拠について示す。図５はH-900×300×19×32の梁継ぎ手をSCSS-H97に従って設計した例である。ボルトはM22−F15TおよびM22−F10Tを想定する。すべり係数が増加するにつれてボルト本数は下がるがすべり係数0.7を超えると低下率は小さくなる。これは、すべり係数が高くなるとボルト本数が終局せん断耐力で決定するためである。従って、すべり係数は0.70以上あれば実用上は十分である。以上の理由より目標すべり係数を0.70と設定した。 The basis for the target slip coefficient of 0.70 is shown below. FIG. 5 shows an example in which a beam joint of H-900 × 300 × 19 × 32 is designed according to SCSS-H97. Bolts are assumed to be M22-F15T and M22-F10T. The number of bolts decreases as the slip coefficient increases, but the decrease rate decreases when the slip coefficient exceeds 0.7. This is because the number of bolts is determined by the ultimate shear strength when the slip coefficient increases. Therefore, a slip coefficient of 0.70 or more is sufficient for practical use. For the above reasons, the target slip coefficient was set to 0.70.
本発明において、アーク溶射はスプライスプレートに対してのみ行えばよい。被接合材でありＨ形鋼のような大型の構造材に溶射するには、大掛かりな設備が必要となり、結果として高価になる。 In the present invention, arc spraying may be performed only on the splice plate. In order to spray a large-sized structural material such as an H-shaped steel, which is a material to be joined, a large-scale facility is required, resulting in an increase in cost.
１…Ｈ形鋼（被接合材）
２…フランジ
３…ウェブ
４…スプライスプレート
５…高力ボルト
６…ナット
７…フィラープレート
１０…アーク溶射による金属溶射被膜
1 ... H-section steel (material to be joined)
2 ... Flange 3 ...
Claims (2)
前記摩擦接合面に、ビッカース硬度Ｈｖ300以上、かつ、表面粗さの最大高さＲmaxが100μm以上、かつ、表面粗さの最高高さから下へ100μmの位置での輪郭曲線の負荷長さ率（＝凸部の切断長さの総和／基準長さ）が0.34以上の被膜がアーク溶射により形成されていることを特徴とする高力ボルト摩擦接合構造。 In the high-strength bolt friction joint structure that tightens the joint plate attached to the joint end of a pair of steel materials to be joined with a high-strength bolt and transmits the force by the frictional force of the friction joint surface between the joint plate and the steel material.
The friction joint surface has a Vickers hardness of Hv300 or higher, a maximum surface roughness height Rmax of 100 μm or more, and a contour curve load length ratio at a position of 100 μm below the maximum height of surface roughness ( = A high-strength bolt friction joint structure in which a coating having a sum of cutting lengths of protrusions / reference length) of 0.34 or more is formed by arc spraying.
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| JP4555883B2 (en) * | 2009-01-06 | 2010-10-06 | 新日本製鐵株式会社 | Friction bonding member and friction bonding structure |
| JP5599027B2 (en) * | 2009-11-06 | 2014-10-01 | 川田工業株式会社 | Long-term anti-rust joint structure |
| DE102011005921A1 (en) * | 2010-12-07 | 2012-06-14 | Aktiebolaget Skf | Friction-increasing paint and thus coated machine part |
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| JPS5152628A (en) * | 1974-11-02 | 1976-05-10 | Nippon Steel Corp | KORYOKUBORUTOMASATSUSETSUGOYOKOZAI |
| JPH01206104A (en) * | 1988-02-12 | 1989-08-18 | Mitsui Constr Co Ltd | Joining method for high strength bolt friction joint |
| JPH01266309A (en) * | 1988-04-18 | 1989-10-24 | Takenaka Komuten Co Ltd | Frictional connection method for high strength bolt |
| JPH06272323A (en) * | 1993-03-24 | 1994-09-27 | Nkk Corp | High-strength bolt friction grip joint structure |
| JPH0849040A (en) * | 1994-08-05 | 1996-02-20 | Nippon Steel Corp | Steel sheet for frictionally joining high tensile strength bolt having ruggedness on surface and its production |
| JP3333644B2 (en) * | 1994-09-14 | 2002-10-15 | 新日本製鐵株式会社 | Steel for high strength bolt friction welding |
| JPH0932814A (en) * | 1995-07-19 | 1997-02-04 | Nippon Steel Corp | Splice plate for friction junction of high power bolt |
| JP3488792B2 (en) * | 1996-11-29 | 2004-01-19 | 京セラ株式会社 | Bioprosthetic members |
| JP2000120183A (en) * | 1998-10-09 | 2000-04-25 | Miyoshi Nakagawa | Splice part structure such as shape steel and splice plate |
| JP2000283302A (en) * | 1999-03-30 | 2000-10-13 | Kyocera Corp | Disc valve |
| JP3490955B2 (en) * | 2000-05-16 | 2004-01-26 | 浜木 綾子 | Steel joint structure |
| JP2005344138A (en) * | 2004-05-31 | 2005-12-15 | Jfe Mechanical Co Ltd | Colored thermally sprayed coating-formed member |
| JP4851105B2 (en) * | 2005-03-07 | 2012-01-11 | バンドー化学株式会社 | Belt drive |
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